42128890207 has 4 divisors (see below), whose sum is σ = 42129605896. Its totient is φ = 42128174520.

The previous prime is 42128890201. The next prime is 42128890259. The reversal of 42128890207 is 70209882124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42128890207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42128890201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260769 + ... + 390202.

It is an arithmetic number, because the mean of its divisors is an integer number (10532401474).

Almost surely, 2^42128890207 is an apocalyptic number.

42128890207 is a deficient number, since it is larger than the sum of its proper divisors (715689).

42128890207 is an equidigital number, since it uses as much as digits as its factorization.

42128890207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715688.

The product of its (nonzero) digits is 129024, while the sum is 43.

The spelling of 42128890207 in words is "forty-two billion, one hundred twenty-eight million, eight hundred ninety thousand, two hundred seven".